1. is required for all biochemical reactions that make the body function
2. acts as a carrier and dilutant for many bodily functions
3. maintains body temperature

Water remains constant in healthy animals, maintaining a balance between the intake of water and the output.

Water in the body can be from:

1. drinking water
2. water in feed
3. metabolic activity

Water is eliminated through:

1. excretion of urine and feces
2. perspiration
3. respiration